I'm sorry, what?
White Rose was useless and didn't produced any positive outcomes. All it accomplished was getting some kids dead. And if it was so intellectual, why they didn't tough about making it a bit harder to catch all core members in on swoop?
BTW. any non-violent movement can be easily ignored if alternatively there is no threat of violence. "You can talk with us or alternatively with people willing to put bombs into your car. The choice is yours. You can try neither, but there is non zero possibility that one day bomb in your car will be missed and your successor will be more willing to have a talk."
You can deal with Gandhi or deal with several million Indian nationals who want your heads on pikes.
You can deal with Dr. King or you can deal with Malcom X and the Panthers.
Etc...